The reverse planetary ball screw is suitable for compact scenarios, such as humanoid robots.
1) The reverse planetary roller screw has a longer nut and can achieve a greater load with less torque. The structure of the reverse planetary roller screw is similar to the standard type, but there is no inner tooth ring, both ends of the screw are processed with straight teeth meshing with the gears at both ends of the roller, the nut as an active part, the length is much larger than the standard type, and the advantage is that the higher rated load is achieved through the smaller lead, thus reducing the driving torque, suitable for compact situations.
2) The lead screw and motor can be integrated. The gear of the reverse planetary roller lead screw is designed between the roller and the lead screw to provide a smoother and more stable synchronous rotation motion, which is mainly used for small and medium loads, small strokes and high-speed applications. At the same time, the structure can realize the integrated design of motor and lead screw.